"We thought [going to Tulane] she'd just find an education," Debra Stern-Ellis, Mikayla's mom, told the Hullabaloo, "but she found a sister."

Stern-Ellis, 19, and Nappi, 18, met on Facebook during the roommate search process. Though Nappi already had a roommate, they stayed in touch through the social networking site. Through these conversations, they discovered that they both were conceived with the help of a Colombian sperm donor and joked with each other about the possibility that they were related.